\f
;;;; reading internal run time with high resolution and low overhead
-;;; FIXME: It might make sense to replace this with something
-;;; with finer resolution, e.g. milliseconds or microseconds.
-;;; For that matter, maybe we should boost the internal clock
-;;; up to something faster, like milliseconds.
-
(defconstant +ticks-per-second+ internal-time-units-per-second)
(declaim (inline get-internal-ticks))
(defun get-internal-ticks () (get-internal-run-time))
\f
-;;;; PCOUNTER
-
-;;; a PCOUNTER is used to represent an unsigned integer quantity which
-;;; can grow bigger than a fixnum, but typically does so, if at all,
-;;; in many small steps, where we don't want to cons on every step.
-;;; (Total system consing, time spent in a profiled function, and
-;;; bytes consed in a profiled function are all examples of such
-;;; quantities.)
-(defstruct (pcounter (:copier nil))
- (integer 0 :type unsigned-byte)
- (fixnum 0 :type (and fixnum unsigned-byte)))
-
-(declaim (ftype (function (pcounter integer) pcounter) incf-pcounter))
-;;;(declaim (inline incf-pcounter)) ; FIXME: maybe inline when more stable
-(defun incf-pcounter (pcounter delta)
- (let ((sum (+ (pcounter-fixnum pcounter) delta)))
- (cond ((typep sum 'fixnum)
- (setf (pcounter-fixnum pcounter) sum))
- (t
- (incf (pcounter-integer pcounter) sum)
- (setf (pcounter-fixnum pcounter) 0))))
- pcounter)
-
-(declaim (ftype (function (pcounter) integer) pcounter->integer))
-;;;(declaim (inline pcounter->integer)) ; FIXME: maybe inline when more stable
-(defun pcounter->integer (pcounter)
- (+ (pcounter-integer pcounter)
- (pcounter-fixnum pcounter)))
-\f
-;;;; operations on (OR PCOUNTER FIXNUM)
-;;;;
-;;;; When we don't want to cons a PCOUNTER unless we're forced to, we
-;;;; start with a FIXNUM counter and only create a PCOUNTER if the
-;;;; FIXNUM overflows.
-
-(declaim (ftype (function ((or pcounter fixnum) integer) (or pcounter fixnum)) %incf-pcounter-or-fixnum))
-;;;(declaim (inline %incf-pcounter-or-fixnum)) ; FIXME: maybe inline when more stable
-(defun %incf-pcounter-or-fixnum (x delta)
- (etypecase x
- (fixnum
- (let ((sum (+ x delta)))
- (if (typep sum 'fixnum)
- sum
- (make-pcounter :integer sum))))
- (pcounter
- (incf-pcounter x delta))))
-
-(define-modify-macro incf-pcounter-or-fixnum (delta) %incf-pcounter-or-fixnum)
-
-;;; Trade off space for execution time by handling the common fast
-;;; (TYPEP DELTA 'FIXNUM) case inline and only calling generic
-;;; arithmetic as a last resort.
-(defmacro fastbig-incf-pcounter-or-fixnum (x delta)
- (once-only ((delta delta))
- `(etypecase ,delta
- (fixnum (incf-pcounter-or-fixnum ,x ,delta))
- (integer (incf-pcounter-or-fixnum ,x ,delta)))))
-
-(declaim (ftype (function ((or pcounter fixnum)) integer) pcounter-or-fixnum->integer))
-(declaim (maybe-inline pcounter-or-fixnum->integer))
-(defun pcounter-or-fixnum->integer (x)
- (etypecase x
- (fixnum x)
- (pcounter (pcounter->integer x))))
-\f
;;;; implementation-dependent interfaces
#|
(declaim (ftype (function ((or symbol cons)) (values fixnum t)) fun-signature))
(defun fun-signature (name)
(let ((type (info :function :type name)))
- (cond ((not (function-type-p type))
- (values 0 t))
- (t
- (values (length (function-type-required type))
- (or (function-type-optional type)
- (function-type-keyp type)
- (function-type-rest type)))))))
+ (cond ((not (fun-type-p type))
+ (values 0 t))
+ (t
+ (values (length (fun-type-required type))
+ (or (fun-type-optional type)
+ (fun-type-keyp type)
+ (fun-type-rest type)))))))
|#
\f
;;;; global data structures
;;; We associate a PROFILE-INFO structure with each profiled function
;;; name. This holds the functions that we call to manipulate the
;;; closure which implements the encapsulation.
-(defvar *profiled-function-name->info* (make-hash-table))
+(defvar *profiled-fun-name->info*
+ (make-hash-table
+ ;; EQL testing isn't good enough for generalized function names
+ ;; like (SETF FOO).
+ :test 'equal
+ :synchronized t))
(defstruct (profile-info (:copier nil))
- (name (required-argument) :read-only t)
- (encapsulated-fun (required-argument) :type function :read-only t)
- (encapsulation-fun (required-argument) :type function :read-only t)
- (read-stats-fun (required-argument) :type function :read-only t)
- (clear-stats-fun (required-argument) :type function :read-only t))
+ (name (missing-arg) :read-only t)
+ (encapsulated-fun (missing-arg) :type function :read-only t)
+ (encapsulation-fun (missing-arg) :type function :read-only t)
+ (read-stats-fun (missing-arg) :type function :read-only t)
+ (clear-stats-fun (missing-arg) :type function :read-only t))
;;; These variables are used to subtract out the time and consing for
;;; recursive and other dynamically nested profiled calls. The total
(defvar *enclosed-profiles* 0)
(declaim (type (or pcounter fixnum) *enclosed-profiles*))
+;;; the encapsulated function we're currently computing profiling data
+;;; for, recorded so that we can detect the problem of
+;;; PROFILE-computing machinery calling a function which has itself
+;;; been PROFILEd
+(defvar *computing-profiling-data-for*)
+
;;; the components of profiling overhead
(defstruct (overhead (:copier nil))
;; the number of ticks a bare function call takes. This is
;; factored into the other overheads, but not used for itself.
- (call (required-argument) :type single-float :read-only t)
+ (call (missing-arg) :type single-float :read-only t)
;; the number of ticks that will be charged to a profiled
;; function due to the profiling code
- (internal (required-argument) :type single-float :read-only t)
+ (internal (missing-arg) :type single-float :read-only t)
;; the number of ticks of overhead for profiling that a single
;; profiled call adds to the total runtime for the program
- (total (required-argument) :type single-float :read-only t))
+ (total (missing-arg) :type single-float :read-only t))
(defvar *overhead*)
(declaim (type overhead *overhead*))
+(makunbound '*overhead*) ; in case we reload this file when tweaking
\f
;;;; profile encapsulations
-;;; Trade off space for time by handling the usual all-FIXNUM cases
-;;; inline.
+;;; Trade off space for time by handling the usual all-FIXNUM cases inline.
(defmacro fastbig- (x y)
(once-only ((x x) (y y))
- `(if (and (typep ,x 'fixnum)
- (typep ,y 'fixnum))
- (- ,x ,y)
- (- ,x ,y))))
+ `(if (and (typep ,x '(and fixnum unsigned-byte))
+ (typep ,y '(and fixnum unsigned-byte)))
+ ;; special case: can use fixnum arithmetic and be guaranteed
+ ;; the result is also a fixnum
+ (- ,x ,y)
+ ;; general case
+ (- ,x ,y))))
(defmacro fastbig-1+ (x)
(once-only ((x x))
`(if (typep ,x 'index)
- (1+ ,x)
- (1+ ,x))))
+ (1+ ,x)
+ (1+ ,x))))
;;; Return a collection of closures over the same lexical context,
;;; (VALUES ENCAPSULATION-FUN READ-STATS-FUN CLEAR-STATS-FUN).
;;;
;;; ENCAPSULATION-FUN is a plug-in replacement for ENCAPSULATED-FUN,
-;;; which updates statistics whenver it's called.
+;;; which updates statistics whenever it's called.
;;;
;;; READ-STATS-FUN returns the statistics:
;;; (VALUES COUNT TIME CONSING PROFILE).
(defun profile-encapsulation-lambdas (encapsulated-fun)
(declare (type function encapsulated-fun))
(let* ((count 0)
- (ticks 0)
- (consing 0)
- (profiles 0))
+ (ticks 0)
+ (consing 0)
+ (profiles 0))
(declare (type (or pcounter fixnum) count ticks consing profiles))
(values
;; ENCAPSULATION-FUN
- (lambda (sb-c:&more arg-context arg-count)
+ (lambda (&more arg-context arg-count)
(declare (optimize speed safety))
+ ;; Make sure that we're not recursing infinitely.
+ (when (boundp '*computing-profiling-data-for*)
+ (unprofile-all) ; to avoid further recursion
+ (error "~@<When computing profiling data for ~S, the profiled function ~S was called. To get out of this infinite recursion, all functions have been unprofiled. (Since the profiling system evidently uses ~S in its computations, it looks as though it's a bad idea to profile it.)~:@>"
+ *computing-profiling-data-for*
+ encapsulated-fun
+ encapsulated-fun))
;; FIXME: Probably when this is stable, we should optimize (SAFETY 0).
(fastbig-incf-pcounter-or-fixnum count 1)
(let ((dticks 0)
- (dconsing 0)
- (inner-enclosed-profiles 0))
- (declare (type unsigned-byte dticks dconsing))
- (declare (type unsigned-byte inner-enclosed-profiles))
- (multiple-value-prog1
- (let ((start-ticks (get-internal-ticks))
- ;; KLUDGE: We add (THE UNSIGNED-BYTE ..) wrappers
- ;; around GET-BYTES-CONSED because as of
- ;; sbcl-0.6.4, at the time that the FTYPE of
- ;; GET-BYTES-CONSED is DECLAIMed, the
- ;; cross-compiler's type system isn't mature enough
- ;; to do anything about it. -- WHN 20000503
- (start-consing (the unsigned-byte (get-bytes-consed)))
- (*enclosed-ticks* 0)
- (*enclosed-consing* 0)
- (*enclosed-profiles* 0))
- (declare (inline pcounter-or-fixnum->integer))
- (multiple-value-prog1
- (multiple-value-call encapsulated-fun
- (sb-c:%more-arg-values arg-context
- 0
- arg-count))
- (setf dticks (fastbig- (get-internal-ticks) start-ticks)
- dconsing (fastbig- (the unsigned-byte
- (get-bytes-consed))
- start-consing))
- (setf inner-enclosed-profiles
- (pcounter-or-fixnum->integer *enclosed-profiles*))
- (fastbig-incf-pcounter-or-fixnum ticks (fastbig-
- dticks
- *enclosed-ticks*))
- (fastbig-incf-pcounter-or-fixnum consing
- (fastbig-
- dconsing
- *enclosed-consing*))
- (fastbig-incf-pcounter-or-fixnum profiles
- inner-enclosed-profiles)))
- (fastbig-incf-pcounter-or-fixnum *enclosed-ticks* dticks)
- (fastbig-incf-pcounter-or-fixnum *enclosed-consing* dconsing)
- (fastbig-incf-pcounter-or-fixnum *enclosed-profiles*
- (fastbig-1+
- inner-enclosed-profiles)))))
+ (dconsing 0)
+ (inner-enclosed-profiles 0))
+ (declare (type unsigned-byte dticks dconsing inner-enclosed-profiles)
+ (dynamic-extent dticks dconsing inner-enclosed-profiles))
+ (aver (typep dticks 'unsigned-byte))
+ (aver (typep dconsing 'unsigned-byte))
+ (aver (typep inner-enclosed-profiles 'unsigned-byte))
+ (unwind-protect
+ (let* ((start-ticks (get-internal-ticks))
+ (*enclosed-ticks* 0)
+ (*enclosed-consing* 0)
+ (*enclosed-profiles* 0)
+ (nbf0 *n-bytes-freed-or-purified*)
+ (dynamic-usage-0 (sb-kernel:dynamic-usage)))
+ (declare (inline pcounter-or-fixnum->integer))
+ (unwind-protect
+ (multiple-value-call encapsulated-fun
+ (sb-c:%more-arg-values arg-context
+ 0
+ arg-count))
+ (let ((*computing-profiling-data-for* encapsulated-fun)
+ (dynamic-usage-1 (sb-kernel:dynamic-usage)))
+ (setf dticks (fastbig- (get-internal-ticks) start-ticks))
+ (setf dconsing
+ (if (eql *n-bytes-freed-or-purified* nbf0)
+ ;; common special case where we can avoid
+ ;; bignum arithmetic
+ (- dynamic-usage-1 dynamic-usage-0)
+ ;; general case
+ (- (get-bytes-consed) nbf0 dynamic-usage-0)))
+ (setf inner-enclosed-profiles
+ (pcounter-or-fixnum->integer *enclosed-profiles*))
+ (let ((net-dticks (fastbig- dticks *enclosed-ticks*)))
+ (fastbig-incf-pcounter-or-fixnum ticks net-dticks))
+ (let ((net-dconsing (fastbig- dconsing
+ (pcounter-or-fixnum->integer
+ *enclosed-consing*))))
+ (fastbig-incf-pcounter-or-fixnum consing net-dconsing))
+ (fastbig-incf-pcounter-or-fixnum profiles
+ inner-enclosed-profiles))))
+ (fastbig-incf-pcounter-or-fixnum *enclosed-ticks* dticks)
+ (fastbig-incf-pcounter-or-fixnum *enclosed-consing* dconsing)
+ (fastbig-incf-pcounter-or-fixnum *enclosed-profiles*
+ (fastbig-1+
+ inner-enclosed-profiles)))))
;; READ-STATS-FUN
(lambda ()
(values (pcounter-or-fixnum->integer count)
- (pcounter-or-fixnum->integer ticks)
- (pcounter-or-fixnum->integer consing)
- (pcounter-or-fixnum->integer profiles)))
+ (pcounter-or-fixnum->integer ticks)
+ (pcounter-or-fixnum->integer consing)
+ (pcounter-or-fixnum->integer profiles)))
;; CLEAR-STATS-FUN
(lambda ()
(setf count 0
- ticks 0
- consing 0
- profiles 0)))))
+ ticks 0
+ consing 0
+ profiles 0)))))
\f
;;;; interfaces
;;; A symbol or (SETF FOO) list names a function, a string names all
;;; the functions named by symbols in the named package.
-(defun mapc-on-named-functions (function names)
+(defun mapc-on-named-funs (function names)
(dolist (name names)
(etypecase name
(symbol (funcall function name))
(list
- ;; We call this just for the side effect of checking that
- ;; NAME is a legal function name:
- (function-name-block-name name)
+ (legal-fun-name-or-type-error name)
;; Then we map onto it.
(funcall function name))
(string (let ((package (find-undeleted-package-or-lose name)))
- (do-symbols (symbol package)
- (when (eq (symbol-package symbol) package)
- (when (fboundp symbol)
- (funcall function symbol))
- (let ((setf-name `(setf ,symbol)))
- (when (fboundp setf-name)
- (funcall function setf-name)))))))))
+ (do-symbols (symbol package)
+ (when (eq (symbol-package symbol) package)
+ (when (and (fboundp symbol)
+ (not (macro-function symbol))
+ (not (special-operator-p symbol)))
+ (funcall function symbol))
+ (let ((setf-name `(setf ,symbol)))
+ (when (fboundp setf-name)
+ (funcall function setf-name)))))))))
(values))
;;; Profile the named function, which should exist and not be profiled
;;; already.
-(defun profile-1-unprofiled-function (name)
- (declare #.*optimize-byte-compilation*)
+(defun profile-1-unprofiled-fun (name)
(let ((encapsulated-fun (fdefinition name)))
(multiple-value-bind (encapsulation-fun read-stats-fun clear-stats-fun)
- (profile-encapsulation-lambdas encapsulated-fun)
- (setf (fdefinition name)
- encapsulation-fun)
- (setf (gethash name *profiled-function-name->info*)
- (make-profile-info :name name
- :encapsulated-fun encapsulated-fun
- :encapsulation-fun encapsulation-fun
- :read-stats-fun read-stats-fun
- :clear-stats-fun clear-stats-fun))
+ (profile-encapsulation-lambdas encapsulated-fun)
+ (without-package-locks
+ (setf (fdefinition name)
+ encapsulation-fun))
+ (setf (gethash name *profiled-fun-name->info*)
+ (make-profile-info :name name
+ :encapsulated-fun encapsulated-fun
+ :encapsulation-fun encapsulation-fun
+ :read-stats-fun read-stats-fun
+ :clear-stats-fun clear-stats-fun))
(values))))
;;; Profile the named function. If already profiled, unprofile first.
-(defun profile-1-function (name)
- (declare #.*optimize-byte-compilation*)
+(defun profile-1-fun (name)
(cond ((fboundp name)
- (when (gethash name *profiled-function-name->info*)
- (warn "~S is already profiled, so unprofiling it first." name)
- (unprofile-1-function name))
- (profile-1-unprofiled-function name))
- (t
- (warn "ignoring undefined function ~S" name)))
+ (when (gethash name *profiled-fun-name->info*)
+ (warn "~S is already profiled, so unprofiling it first." name)
+ (unprofile-1-fun name))
+ (profile-1-unprofiled-fun name))
+ (t
+ (warn "ignoring undefined function ~S" name)))
(values))
;;; Unprofile the named function, if it is profiled.
-(defun unprofile-1-function (name)
- (declare #.*optimize-byte-compilation*)
- (let ((pinfo (gethash name *profiled-function-name->info*)))
+(defun unprofile-1-fun (name)
+ (let ((pinfo (gethash name *profiled-fun-name->info*)))
(cond (pinfo
- (remhash name *profiled-function-name->info*)
- (if (eq (fdefinition name) (profile-info-encapsulation-fun pinfo))
- (setf (fdefinition name) (profile-info-encapsulated-fun pinfo))
- (warn "preserving current definition of redefined function ~S"
- name)))
- (t
- (warn "~S is not a profiled function." name))))
+ (remhash name *profiled-fun-name->info*)
+ (if (eq (fdefinition name) (profile-info-encapsulation-fun pinfo))
+ (without-package-locks
+ (setf (fdefinition name) (profile-info-encapsulated-fun pinfo)))
+ (warn "preserving current definition of redefined function ~S"
+ name)))
+ (t
+ (warn "~S is not a profiled function." name))))
(values))
(defmacro profile (&rest names)
reprofile (useful to notice function redefinition.) If a name is
undefined, then we give a warning and ignore it. See also
UNPROFILE, REPORT and RESET."
- (declare #.*optimize-byte-compilation*)
(if (null names)
- `(loop for k being each hash-key in *profiled-function-name->info*
- collecting k)
- `(mapc-on-named-functions #'profile-1-function ',names)))
+ `(loop for k being each hash-key in *profiled-fun-name->info*
+ collecting k)
+ `(mapc-on-named-funs #'profile-1-fun ',names)))
(defmacro unprofile (&rest names)
#+sb-doc
"Unwrap any profiling code around the named functions, or if no names
are given, unprofile all profiled functions. A symbol names
a function. A string names all the functions named by symbols in the
- named package. NAMES defaults to the list of names of all currently
+ named package. NAMES defaults to the list of names of all currently
profiled functions."
- (declare #.*optimize-byte-compilation*)
(if names
- `(mapc-on-named-functions #'unprofile-1-function ',names)
+ `(mapc-on-named-funs #'unprofile-1-fun ',names)
`(unprofile-all)))
(defun unprofile-all ()
- (declare #.*optimize-byte-compilation*)
- (dohash (name profile-info *profiled-function-name->info*)
+ (dohash ((name profile-info) *profiled-fun-name->info*
+ :locked t)
(declare (ignore profile-info))
- (unprofile-1-function name)))
+ (unprofile-1-fun name)))
(defun reset ()
"Reset the counters for all profiled functions."
- (dohash (name profile-info *profiled-function-name->info*)
+ (dohash ((name profile-info) *profiled-fun-name->info* :locked t)
(declare (ignore name))
(funcall (profile-info-clear-stats-fun profile-info))))
\f
;;; the enclosing function.
(defun compensate-time (calls ticks profile)
(let ((raw-compensated
- (- (/ (float ticks) (float +ticks-per-second+))
- (* (overhead-internal *overhead*) (float calls))
- (* (- (overhead-total *overhead*)
- (overhead-internal *overhead*))
- (float profile)))))
+ (- (/ (float ticks) (float +ticks-per-second+))
+ (* (overhead-internal *overhead*) (float calls))
+ (* (- (overhead-total *overhead*)
+ (overhead-internal *overhead*))
+ (float profile)))))
(max raw-compensated 0.0)))
(defun report ()
- "Report results from profiling. The results are
-approximately adjusted for profiling overhead, but when RAW is true
-the unadjusted results are reported. The compensation may be somewhat
-inaccurate when bignums are involved in runtime calculation, as in
-a very-long-running Lisp process."
- (declare #.*optimize-external-despite-byte-compilation*)
+ "Report results from profiling. The results are approximately adjusted
+for profiling overhead. The compensation may be rather inaccurate when
+bignums are involved in runtime calculation, as in a very-long-running
+Lisp process."
(unless (boundp '*overhead*)
(setf *overhead*
- (compute-overhead)))
+ (compute-overhead)))
(let ((time-info-list ())
- (no-call-name-list ()))
- (dohash (name pinfo *profiled-function-name->info*)
+ (no-call-name-list ()))
+ (dohash ((name pinfo) *profiled-fun-name->info* :locked t)
(unless (eq (fdefinition name)
- (profile-info-encapsulation-fun pinfo))
- (warn "Function ~S has been redefined, so times may be inaccurate.~@
- PROFILE it again to record calls to the new definition."
- name))
+ (profile-info-encapsulation-fun pinfo))
+ (warn "Function ~S has been redefined, so times may be inaccurate.~@
+ PROFILE it again to record calls to the new definition."
+ name))
(multiple-value-bind (calls ticks consing profile)
- (funcall (profile-info-read-stats-fun pinfo))
- (if (zerop calls)
- (push name no-call-name-list)
- (push (make-time-info :name name
- :calls calls
- :seconds (compensate-time calls
- ticks
- profile)
- :consing consing)
- time-info-list))))
+ (funcall (profile-info-read-stats-fun pinfo))
+ (if (zerop calls)
+ (push name no-call-name-list)
+ (push (make-time-info :name name
+ :calls calls
+ :seconds (compensate-time calls
+ ticks
+ profile)
+ :consing consing)
+ time-info-list))))
(setf time-info-list
- (sort time-info-list
- #'>=
- :key #'time-info-seconds))
+ (sort time-info-list
+ #'>=
+ :key #'time-info-seconds))
+ (print-profile-table time-info-list)
+
+ (when no-call-name-list
+ (format *trace-output*
+ "~%These functions were not called:~%~{~<~%~:; ~S~>~}~%"
+ (sort no-call-name-list #'string<
+ :key (lambda (name)
+ (symbol-name (fun-name-block-name name))))))
+
+ (values)))
- (format *trace-output*
- "~& seconds | consed | calls | sec/call | name~@
- ------------------------------------------------------~%")
- (let ((total-time 0.0)
- (total-consed 0)
- (total-calls 0))
+(defun print-profile-table (time-info-list)
+ (let ((total-seconds 0.0)
+ (total-consed 0)
+ (total-calls 0)
+ (seconds-width (length "seconds"))
+ (consed-width (length "consed"))
+ (calls-width (length "calls"))
+ (sec/call-width 10)
+ (name-width 6))
+ (dolist (time-info time-info-list)
+ (incf total-seconds (time-info-seconds time-info))
+ (incf total-consed (time-info-consing time-info))
+ (incf total-calls (time-info-calls time-info)))
+ (setf seconds-width (max (length (format nil "~10,3F" total-seconds))
+ seconds-width)
+ calls-width (max (length (format nil "~:D" total-calls))
+ calls-width)
+ consed-width (max (length (format nil "~:D" total-consed))
+ consed-width))
+
+ (flet ((dashes ()
+ (dotimes (i (+ seconds-width consed-width calls-width
+ sec/call-width name-width
+ (* 5 3)))
+ (write-char #\- *trace-output*))
+ (terpri *trace-output*)))
+ (format *trace-output* "~&~@{ ~v:@<~A~>~^|~}~%"
+ seconds-width "seconds"
+ (1+ consed-width) "consed"
+ (1+ calls-width) "calls"
+ (1+ sec/call-width) "sec/call"
+ (1+ name-width) "name")
+
+ (dashes)
+
(dolist (time-info time-info-list)
- (incf total-time (time-info-seconds time-info))
- (incf total-calls (time-info-calls time-info))
- (incf total-consed (time-info-consing time-info))
- (format *trace-output*
- "~10,3F | ~9:D | ~7:D | ~10,6F | ~S~%"
- (time-info-seconds time-info)
- (time-info-consing time-info)
- (time-info-calls time-info)
- (/ (time-info-seconds time-info)
- (float (time-info-calls time-info)))
- (time-info-name time-info)))
- (format *trace-output*
- "------------------------------------------------------~@
- ~10,3F | ~9:D | ~7:D | | Total~%"
- total-time total-consed total-calls)
- (format *trace-output*
- "~%estimated total profiling overhead: ~4,2F seconds~%"
- (* (overhead-total *overhead*) (float total-calls)))
- (format *trace-output*
- "~&overhead estimation parameters:~% ~Ss/call, ~Ss total profiling, ~Ss internal profiling~%"
- (overhead-call *overhead*)
- (overhead-total *overhead*)
- (overhead-internal *overhead*)))
+ (format *trace-output* "~v,3F | ~v:D | ~v:D | ~10,6F | ~S~%"
+ seconds-width (time-info-seconds time-info)
+ consed-width (time-info-consing time-info)
+ calls-width (time-info-calls time-info)
+ (/ (time-info-seconds time-info)
+ (float (time-info-calls time-info)))
+ (time-info-name time-info)))
- (when no-call-name-list
+ (dashes)
+
+ (format *trace-output* "~v,3F | ~v:D | ~v:D | | Total~%"
+ seconds-width total-seconds
+ consed-width total-consed
+ calls-width total-calls)
+
+ (format *trace-output*
+ "~%estimated total profiling overhead: ~4,2F seconds~%"
+ (* (overhead-total *overhead*) (float total-calls)))
(format *trace-output*
- "~%These functions were not called:~%~{~<~%~:; ~S~>~}~%"
- (sort no-call-name-list #'string<
- :key (lambda (name)
- (symbol-name (function-name-block-name name))))))
+ "~&overhead estimation parameters:~% ~Ss/call, ~Ss total profiling, ~Ss internal profiling~%"
+ (overhead-call *overhead*)
+ (overhead-total *overhead*)
+ (overhead-internal *overhead*)))))
- (values)))
\f
;;;; overhead estimation
;;; We average the timing overhead over this many iterations.
-(defconstant +timer-overhead-iterations+ 50000)
+;;;
+;;; (This is a variable, not a constant, so that it can be set in
+;;; .sbclrc if desired. Right now, that's an unsupported extension
+;;; that I (WHN) use for my own experimentation, but it might
+;;; become supported someday. Comments?)
+(declaim (type unsigned-byte *timer-overhead-iterations*))
+(defparameter *timer-overhead-iterations*
+ 500000)
;;; a dummy function that we profile to find profiling overhead
(declaim (notinline compute-overhead-aux))
;;; Return a newly computed OVERHEAD object.
(defun compute-overhead ()
+ (format *debug-io* "~&measuring PROFILE overhead..")
(flet ((frob ()
- (let ((start (get-internal-ticks))
- (fun (symbol-function 'compute-overhead-aux)))
- (dotimes (i +timer-overhead-iterations+)
- (funcall fun fun))
- (/ (float (- (get-internal-ticks) start))
- (float +ticks-per-second+)
- (float +timer-overhead-iterations+)))))
+ (let ((start (get-internal-ticks))
+ (fun (symbol-function 'compute-overhead-aux)))
+ (declare (type function fun))
+ (dotimes (i *timer-overhead-iterations*)
+ (funcall fun fun))
+ (/ (float (- (get-internal-ticks) start))
+ (float +ticks-per-second+)
+ (float *timer-overhead-iterations*)))))
(let (;; Measure unprofiled calls to estimate call overhead.
- (call-overhead (frob))
- total-overhead
- internal-overhead)
+ (call-overhead (frob))
+ total-overhead
+ internal-overhead)
;; Measure profiled calls to estimate profiling overhead.
(unwind-protect
- (progn
- (profile compute-overhead-aux)
- (setf total-overhead
- (- (frob) call-overhead)))
- (let* ((pinfo (gethash 'compute-overhead-aux
- *profiled-function-name->info*))
- (read-stats-fun (profile-info-read-stats-fun pinfo))
- (time (nth-value 1 (funcall read-stats-fun))))
- (setf internal-overhead
- (/ (float time)
- (float +ticks-per-second+)
- (float +timer-overhead-iterations+))))
- (unprofile compute-overhead-aux))
- (make-overhead :call call-overhead
- :total total-overhead
- :internal internal-overhead))))
+ (progn
+ (profile compute-overhead-aux)
+ (setf total-overhead
+ (- (frob) call-overhead)))
+ (let* ((pinfo (gethash 'compute-overhead-aux
+ *profiled-fun-name->info*))
+ (read-stats-fun (profile-info-read-stats-fun pinfo))
+ (time (nth-value 1 (funcall read-stats-fun))))
+ (setf internal-overhead
+ (/ (float time)
+ (float +ticks-per-second+)
+ (float *timer-overhead-iterations*))))
+ (unprofile compute-overhead-aux))
+ (prog1
+ (make-overhead :call call-overhead
+ :total total-overhead
+ :internal internal-overhead)
+ (format *debug-io* "done~%")))))
;;; It would be bad to compute *OVERHEAD*, save it into a .core file,
-;;; then load old *OVERHEAD* value from the .core file into a
+;;; then load the old *OVERHEAD* value from the .core file into a
;;; different machine running at a different speed. We avoid this by
;;; erasing *CALL-OVERHEAD* whenever we save a .core file.
-(pushnew (lambda ()
- (makunbound '*overhead*))
- *before-save-initializations*)
+(defun profile-deinit ()
+ (without-package-locks
+ (makunbound '*overhead*)))
projects / sbcl.git / blobdiff